//1
console.log(typeof(123));//number
//2
console.log(typeof(NaN));//number
//3
console.log(typeof('123'));//string
//4
console.log(typeof(true));//boolean
//5
console.log(typeof(undefined));//undedined
//6
console.log(typeof(Math.abs));//function
//7
console.log(typeof(null));//object
//8
console.log(typeof([]));//object
//9
console.log(typeof({}));//object